<u>Trans fats</u> can elevate LDL cholesterol, increase triglycerides, and lower HDL cholesterol.
These fats have a significant result in raising blood cholesterol levels. It exist naturally in small quantity in some meat and dairy products.
The raised blood cholesterol levels are a risk factor for heart disease/attack. Triglycerides are the fat present in our bloodstream.
It is so because trans fatty acids have one or more double bonds present in trans configuration instead of the usual CIS configuration. Trans fats are unsaturated fats produced from vegetable oils. Therefore, trans fats are commonly used in the composition of margarine and commercially baked or fried foods.
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Domain Archaea
Like bacteria,Organisms in domain Archaea are prokaryotic and unicellular. Superficially, they look a lot like bacteria, and many biologists confused them as bacteria until a few decades ago.
The most common cause of anemia is iron deficiency.
Answer:
The source of Calcium (Ca⁺⁺) for the skeletal muscle cells is the sarcoplasmic reticulum, the main store of intracellular Ca⁺⁺.
Explanation:
Calcium (Ca⁺⁺) is an ion that plays an important role in muscle contraction, a process that requires high cytoplasmic concentrations of this ion to promote myofibrillary activity.
The sarcoplasmic reticulum (SR) -equivalent to the endoplasmic smooth reticulum- is an organelle that regulates the contractile activity of skeletal muscle. The two terminal cisterns of the SR attach to the T-tube, forming a triad, which surrounds the myofibrilla.
Once the muscle cell receives the signal to contract, the Ca⁺⁺ channels are opened and allow Ca⁺⁺ to enter the cell, promoting the exit of this cation from the SR and increased its cytoplasmic levels. This stimulates muscle contraction.
